The research investigates the efficiency of pyrolysis in converting these two feedstocks into valuable bio-oil, focusing on yield, composition, and the quality of the resulting products. Polystyrene, a non-biodegradable plastic, represents a significant environmental challenge, while coconut shell biomass is a renewable resource abundant in tropical regions. The nano particles, known for its high selectivity and ability to enhance the deoxygenation process, play a crucial role in optimizing the pyrolysis process. The study evaluates how the catalyst influences the distribution of hydrocarbons in the bio-oil, comparing the results between the two feedstocks. The findings indicate that while both polystyrene and coconut shell biomass can be effectively converted into bio-oil, there are significant differences in the composition and quality of the oil produced. The polystyrene-derived bio-oil is rich in aromatic hydrocarbons, making it potentially valuable as a chemical feedstock, while the biomass-derived oil shows a higher concentration of oxygenated compounds, suggesting its suitability as a renewable fuel source after further refinement. This research highlights the potential of using nano particle in the catalytic pyrolysis of diverse feedstocks and underlines the significance of modifying pyrolysis conditions to the detailed characteristics of the material to optimize bio-oil quality and yield.